/* ===== RESET ===== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #12161b;
  color: #eaecef;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 420px;
  margin: auto;
  padding: 20px 16px 30px;
}

/* ===== HEADER ===== */
.top-header {
  text-align: center;
  margin-bottom: 1px;
}

.brand {
  font-size: 30px;
  font-weight: 600;
  display: inline-block;
}

/* logo inline giữa dòng */
.logo-inline {
  width: 30px;
  height: 30px;

  vertical-align: middle;

  transform: translateY(-3px) scale(1.2);
  margin: 0 6px;

  filter: drop-shadow(0 0 6px rgba(252,213,53,0.4));
}

.brand-yellow {
  color: #FCD535;
}

.brand-white {
  color: #eaecef;
}

/* ===== CARD ===== */
.card {
  background: #1e2329;
  border-radius: 18px;
  padding: 18px;
  border: 1px solid #2b3139;
  box-shadow: 0 15px 40px rgba(0,0,0,0.6);
}

.card > * + * {
  margin-top: 16px;
}

/* ===== SUB ===== */
.sub {
  text-align: center;
  font-size: 13px;
  color: #848e9c;
}

/* ===== NOTE ===== */
.header-note {
  background: #2b3139;
  padding: 12px;
  border-radius: 12px;

  font-size: 13px;
  line-height: 1.6;
  color: #cbd5e1;
}

#userName {
  color: #FCD535;
  font-weight: 600;
}

/* ===== BALANCE ===== */
.balance-card {
  position: relative;
  background: #2b3139;
  border-radius: 14px;
  padding: 16px;

  border: 1px solid rgba(252,213,53,0.15);
}

.balance-label {
  font-size: 12px;
  color: #848e9c;
}

.balance-value {
  font-size: 28px;
  font-weight: 700;
  color: #FCD535;
  margin-top: 6px;
}

.balance-usd {
  font-size: 12px;
  color: #848e9c;
  margin-top: 4px;
}

/* ===== BUTTON ===== */
.main-btn {
  width: 100%;
  padding: 14px;

  border: none;
  border-radius: 12px;

  background: #FCD535;
  color: #000;

  font-size: 15px;
  font-weight: 600;

  cursor: pointer;
  transition: transform 0.15s ease;
}

.main-btn:active {
  transform: scale(0.97);
}

/* ===== GUIDE ===== */
.guide-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
}

/* box */
.guide-box {
  background: #2b3139;
  padding: 14px;
  border-radius: 12px;
}

/* ===== STEP FIX CHUẨN ===== */
.step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.step:last-child {
  margin-bottom: 0;
}

.step-num {
  width: 28px;
  height: 28px;

  min-width: 28px;
  min-height: 28px;

  border-radius: 50%;
  background: #FCD535;
  color: #000;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 13px;
  font-weight: 700;

  flex-shrink: 0;

  margin-top: 3px;

  box-shadow: 0 0 10px rgba(252,213,53,0.25);
}

.step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: #d1d5db;

  transform: translateY(1px);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  font-size: 12px;
  color: #848e9c;
  margin-top: 16px;
}

.main-btn {
  position: relative;
  z-index: 10;
}